550 Inj + Z32MAF + SAFC = ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Pstl_pete · 08-30-2005, 12:10 PM

Hey guys,

Just wondering if there are many people running this type of setup and if so how well? I am looking for tuning solutions for Nismo 555cc injectors and a Z32MAF. I want to boost 13-14psi on my current setup (T28 turbo). I know technically the larger maf should cancel out the larger injector but dont know how well it actually works.

I have been wondering whether to go this route or perhaps try a re-flash. The problem is I dont know if Jim Wolf or Enthalpy do late model S14 ECUs. Scott has been hard to get a hold of lately and I havent talked to JWT yet. Are there any other tuning companies that provide reflashes?

statik · 08-30-2005, 12:45 PM

How does a larger maf cancel out larger injectors? Your ecu doesnt know how to compensate for either of those, thats where the SAFC comes in. Unless you have someone who can help you tune your car I would suggest getting a re-flash. Talk to scott @ enthalpy, hes a good guy, hes AIM alot during the day, if hes away drop him a message and he will get back to you same day usually: Enthalpy1200

Edit: just spoke to scott and he does not in fact do late model s14 ECU's, so JWT is your best bet =]

wootwoot · 08-30-2005, 12:59 PM

Well heres one thing, you cant use an SAFC alone anyway. An SAFC is not capable of supporting that big of injectors on a tottally stock computer. Probably best bet to do for you is to get a JWT ecu and then use the SAFC for fine tuning. SAFC's can only support injectors 50% larger than what the computer is programmed for

Pstl_pete · 08-30-2005, 01:20 PM

Heres what you guys are missing:

555cc injectors flow roughly 33% more fuel than stock 370cc inj's, the Z32MAF flows about 33% more air than stock. So if we put those two together they essential cancel themselves out. Then using the SAFC to fine tune it would be the next step.

This seems to work on paper but I wanted to know if anyone here has actually run it?

Now that I know Scott doesnt do S14s, can anyone confirm if Jim Wolf does?

statik · 08-30-2005, 01:41 PM

Quote:

Originally Posted by Pstl_pete

Heres what you guys are missing:

555cc injectors flow roughly 33% more fuel than stock 370cc inj's, the Z32MAF flows about 33% more air than stock. So if we put those two together they essential cancel themselves out. Then using the SAFC to fine tune it would be the next step.

This seems to work on paper but I wanted to know if anyone here has actually run it?

Now that I know Scott doesnt do S14s, can anyone confirm if Jim Wolf does?

those are rough estimates at best, if the car ran decent at all you would see more people just buying a Z32 maf and some 550's. Call JWT and find out about a flash.

statik · 08-30-2005, 01:48 PM

Quote:

Originally Posted by wootwoot

Well heres one thing, you cant use an SAFC alone anyway. An SAFC is not capable of supporting that big of injectors on a tottally stock computer. Probably best bet to do for you is to get a JWT ecu and then use the SAFC for fine tuning. SAFC's can only support injectors 50% larger than what the computer is programmed for

alot of KA-T's run 550's with z32 maf and an safc, so i dont see why an SR can't

TEALSQUEAL · 08-30-2005, 10:00 PM

that is my set-up wiht a big t28, i am getting a wideband, but to give u an idea i have the msd 52lb/hr injectors instead of the others and mine is leaned out 30% accross the board

Pstl_pete · 08-31-2005, 11:58 AM

Quote:

Originally Posted by TEALSQUEAL

that is my set-up wiht a big t28, i am getting a wideband, but to give u an idea i have the msd 52lb/hr injectors instead of the others and mine is leaned out 30% accross the board

You had to pull out 30% with the Z32 MAF? How does the car run under daily driving conditions?

TEALSQUEAL · 08-31-2005, 04:48 PM

wonderfully i am on 14lbs. i get my wideband this weekend, i am going to data log runs and retune it until i can boost 18lbs. daily

Rezlo · 09-01-2005, 12:53 AM

I run 550's with a Z32maf, cams, porting, ectr ectr in my S14 and I use a S-afc and wide band to tune, my euro spec S14 did not come with factory O2 (pretty unique w5 ecu) so i cant have it reflashed even if i wanted to but I seem to have it spot on perfect just with the afc at 1.2bar.

I would think the new emanage ultimate with o2 compensation would be a nice idea though.

Pstl_pete · 09-01-2005, 07:57 AM

Thanks guys,

I spoke to JWT and they do offer a reflash for the late S14 ECUs.

I also have an AEM wideband installed so that is what I was going to base my tuning on, obviously.

Rezlo, Why do you bring up the factory o2 sensor? Is that a stumbling block for tuning or running larger inj, maf?

Rezlo · 09-02-2005, 12:27 AM

well not having a factory O2 means the ecu has no idea if its running rich or lean during cruizing and cant trim short or long term fuel trim tables as it actualy doesnt use fuel trim tables like most ecu's do, it basicaly just has an efficiency table it runs off all the time.

The nice part is that I can realy fine tune it to how i want it without the ecu trying to compensate, down side is i cant have it flashed, when i get up to 1.5bar its going to create problems not being able to change the A/F and timing tables as needed, im wondering if i cant daughterboard it or somthing like that but ive never heard of anyone doing that with a S14 ecu only the s13's

08-30-2005, 12:10 PM	#1
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	550 Inj + Z32MAF + SAFC = ? Hey guys, Just wondering if there are many people running this type of setup and if so how well? I am looking for tuning solutions for Nismo 555cc injectors and a Z32MAF. I want to boost 13-14psi on my current setup (T28 turbo). I know technically the larger maf should cancel out the larger injector but dont know how well it actually works. I have been wondering whether to go this route or perhaps try a re-flash. The problem is I dont know if Jim Wolf or Enthalpy do late model S14 ECUs. Scott has been hard to get a hold of lately and I havent talked to JWT yet. Are there any other tuning companies that provide reflashes? __________________ S14 - New SR Project http://www.speed.academy

08-30-2005, 12:45 PM	#2
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 37 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	How does a larger maf cancel out larger injectors? Your ecu doesnt know how to compensate for either of those, thats where the SAFC comes in. Unless you have someone who can help you tune your car I would suggest getting a re-flash. Talk to scott @ enthalpy, hes a good guy, hes AIM alot during the day, if hes away drop him a message and he will get back to you same day usually: Enthalpy1200 Edit: just spoke to scott and he does not in fact do late model s14 ECU's, so JWT is your best bet =] __________________ 97 240sx esaarr \| Current Status: SOLD

08-30-2005, 12:59 PM	#3
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 35 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	Well heres one thing, you cant use an SAFC alone anyway. An SAFC is not capable of supporting that big of injectors on a tottally stock computer. Probably best bet to do for you is to get a JWT ecu and then use the SAFC for fine tuning. SAFC's can only support injectors 50% larger than what the computer is programmed for __________________ I'm from Florida so I'm probably a bit more strange than you

08-30-2005, 01:20 PM	#4
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	Heres what you guys are missing: 555cc injectors flow roughly 33% more fuel than stock 370cc inj's, the Z32MAF flows about 33% more air than stock. So if we put those two together they essential cancel themselves out. Then using the SAFC to fine tune it would be the next step. This seems to work on paper but I wanted to know if anyone here has actually run it? Now that I know Scott doesnt do S14s, can anyone confirm if Jim Wolf does? __________________ S14 - New SR Project http://www.speed.academy

09-01-2005, 07:57 AM	#11
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	Thanks guys, I spoke to JWT and they do offer a reflash for the late S14 ECUs. I also have an AEM wideband installed so that is what I was going to base my tuning on, obviously. Rezlo, Why do you bring up the factory o2 sensor? Is that a stumbling block for tuning or running larger inj, maf? __________________ S14 - New SR Project http://www.speed.academy

08-30-2005, 10:00 PM	#7
TEALSQUEAL Zilvia Junkie Join Date: Apr 2004 Location: louisville, ky Posts: 482 Trader Rating: (6) Feedback Score: 6 reviews	that is my set-up wiht a big t28, i am getting a wideband, but to give u an idea i have the msd 52lb/hr injectors instead of the others and mine is leaned out 30% accross the board

08-31-2005, 04:48 PM	#9
TEALSQUEAL Zilvia Junkie Join Date: Apr 2004 Location: louisville, ky Posts: 482 Trader Rating: (6) Feedback Score: 6 reviews	wonderfully i am on 14lbs. i get my wideband this weekend, i am going to data log runs and retune it until i can boost 18lbs. daily

09-01-2005, 12:53 AM	#10
Rezlo Zilvia Member Join Date: Jan 2005 Location: Chicago&South Africa Posts: 292 Trader Rating: (0) Feedback Score: 0 reviews	I run 550's with a Z32maf, cams, porting, ectr ectr in my S14 and I use a S-afc and wide band to tune, my euro spec S14 did not come with factory O2 (pretty unique w5 ecu) so i cant have it reflashed even if i wanted to but I seem to have it spot on perfect just with the afc at 1.2bar. I would think the new emanage ultimate with o2 compensation would be a nice idea though.

09-02-2005, 12:27 AM	#12
Rezlo Zilvia Member Join Date: Jan 2005 Location: Chicago&South Africa Posts: 292 Trader Rating: (0) Feedback Score: 0 reviews	well not having a factory O2 means the ecu has no idea if its running rich or lean during cruizing and cant trim short or long term fuel trim tables as it actualy doesnt use fuel trim tables like most ecu's do, it basicaly just has an efficiency table it runs off all the time. The nice part is that I can realy fine tune it to how i want it without the ecu trying to compensate, down side is i cant have it flashed, when i get up to 1.5bar its going to create problems not being able to change the A/F and timing tables as needed, im wondering if i cant daughterboard it or somthing like that but ive never heard of anyone doing that with a S14 ecu only the s13's

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